• Why the effort?

• offsetGridText
  • Data preparation
  • Specifying pos manually
  • Automated label positioning via thigmophobe
  • Shadow text functionality via grid.stext

• Summary

text

• adj
• pos and offset (overrides adj)

grid.text

• just
• hjust and vjust (overrides just)

text

• shadow text not available

grid.text

• position specifiers not split into
  • pos (1 = bottom, 2 = left, 3 = top, 4 = right) and
  • offset
• no interoperability with thigmophobe

# # install 'Rsenal' package
# library(devtools, quietly = TRUE)
# install_github("environmentalinformatics-marburg/Rsenal")

# load package
library(Rsenal)

# spatial data
load("data/osm_kili.RData")

# print trellis object
print(p)

# enter viewport
downViewport(trellis.vpname(name = "figure"))

# labels
ch_lbl <- shp_kili_sls$PlotID

# insert text
offsetGridText(x = coordinates(shp_kili_sls), 
               labels = ch_lbl, 
               xlim = num_xlim, ylim = num_ylim,
               pos = rep(1, length(ch_lbl)), offset = .0225, 
               gp = gpar(fontsize = 20))

# insert text
offsetGridText(x = coordinates(shp_kili_sls), 
               labels = ch_lbl, 
               xlim = num_xlim, ylim = num_ylim,
               offset = .0225, 
               gp = gpar(fontsize = 20))

# insert text
offsetGridText(x = coordinates(shp_kili_sls), 
               labels = ch_lbl, stext = TRUE, 
               xlim = num_xlim, ylim = num_ylim,
               offset = .0225, 
               gp = gpar(fontsize = 20))

offsetGridText

• included in Rsenal package (hosted on GitHub)
• combines text and grid.text positioning arguments
• compatible with thigmophobe
• features shadow text

This ioslides presentation was entirely created from R Markdown v2.

For further information, check out
http://blog.rstudio.org/2014/06/18/r-markdown-v2/.